Set the oven to 180°C
Place each potato on the cutting board. Place 2 wooden spoons (or something of similar height) alongside the potato while cutting (this will stop you from cutting in too deep). Cut vertical slits in the potatoes.
In a small bowl mix olive oil, garlic, rosemary, basil, salt, and lemon zest. Crush all ingredients with a fork to combine the flavors.
Brush the potatoes with herby oil on every side.
Place the potatoes with the cut side down on a baking tray.
Bake potatoes for about 45 minutes.
While the potatoes are baking, prepare the topping:
In a blender bowl, add all topping ingredients. Pulse a few times to combine all the ingredients.
Remove potatoes from the oven and add the topping.
Put them back in the oven for about 7 minutes more, until the crust is golden.